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Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 877 · 40 questions
TalentJR

What you do (Dry out, crystals in): 1. An adult pours warm water into a cup. 2. Stir in salt, a spoon at a time, until no more dissolves. 3. Pour the salty water into a shallow dish and lay a string in it. 4. Leave it on a sunny windowsill, out of reach of small children, and check each day.

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  1. 1.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
  2. 2.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
  3. 3.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) saturated (d) empty
  4. 4.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) glucose powder (d) chalk powder
  5. 5.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) sugar crystals form (d) it turns to butter
  6. 6.🧂 Which of these dissolves in water? (a) sugar (b) chalk powder (c) sawdust (d) cooking oil
  7. 7.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) crystals grow faster (d) few or no crystals
  8. 8.True or false: a balloon is needed for growing salt crystals. (a) False (b) True
  9. 9.True or false: baking soda dissolves in water. (a) False (b) True
  10. 10.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
  11. 11.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
  12. 12.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
  13. 13.🧂 Which of these dissolves in water? (a) cooking oil (b) sand (c) food colour (d) chalk powder
  14. 14.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
  15. 15.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt grows roots (d) salt eats water
  16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) True (b) False
  17. 17.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) melting butter (d) rusting iron
  18. 18.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) chalk powder (d) table salt
  19. 19.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
  20. 20.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
  21. 21.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
  22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a piece of string (d) a spoon
  23. 23.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
  24. 24.True or false: baking soda does not dissolve in water. (a) True (b) False
  25. 25.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
  26. 26.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) freezing water (c) folding paper (d) dissolving salt
  27. 27.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) salt (d) yeast
  28. 28.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
  29. 29.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
  30. 30.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) milk turning to curd (d) freezing water
  31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) a piece of string (d) salt
  32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) warm water (d) a spoon
  33. 33.🧂 Which of these dissolves in water? (a) glucose powder (b) chalk powder (c) sand (d) cooking oil
  34. 34.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) warm water (d) yeast
  35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we measure it (b) we keep it the same (c) we change it
  36. 36.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
  37. 37.🧂 Which of these does not dissolve in water? (a) food colour (b) sawdust (c) baking soda (d) glucose powder
  38. 38.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
  39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to change its colour (c) to cool the water (d) to make it fizz
  40. 40.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) browning lemon ink (d) baking a cake

Answer key

  1. cannot be undone
  2. True
  3. saturated
  4. chalk powder
  5. sugar crystals form
  6. sugar
  7. few or no crystals
  8. False
  9. True
  10. True
  11. a grown-up
  12. dissolves in water
  13. food colour
  14. cannot be undone
  15. water evaporates
  16. True
  17. rusting iron
  18. table salt
  19. not needed
  20. not needed
  21. tiny cubes
  22. a battery cell
  23. cannot be undone
  24. False
  25. safe from small children
  26. baking a cake
  27. salt
  28. can be undone
  29. False
  30. freezing water
  31. a balloon
  32. yeast
  33. glucose powder
  34. warm water
  35. we keep it the same
  36. can be undone
  37. sawdust
  38. needed
  39. to make it very salty
  40. dissolving salt

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